Performance Loss Due to Imperfect Knowledge of Offered Load in CAC Policies

In this paper, we investigate the effect of imperfect traffic load assessment on the performance of call admission control (CAC) policies in a circuit-switched cellular network. We study two policies that are designed to achieve optimal average data throughput of the system - the optimal stationary randomized call admission control policy (DCA-CAC) and the optimal static fixed-set-partition policy (FCA-FSP). We analyze and numerically evaluate the performance of these polices, which are optimized for somewhat erroneous assessment of the subscribers' call traffic load. The evaluation is done in two-fold 1) impact on throughput 2) impact on blocking probability.